Coal or rock drilling machine



(No Model.) v 2 Sheets-Shet 1. A M. HARDSOGG. GOAL 0R ROCK DRILLING MACHINE.

No. 484,425. Patented 004. 18, 1892.

Inwrmr/ f n/m0 4 a 2 Sheets-Sheet 2.

(No Model.)

M. HARDSOGG. GOAL 0R ROCK DRILLING MACHINE.

No. 484,425. Patented Oct. 18, 1892.

iii/ 4? llllllllllllllll UNITED STATES PATENT OFFICE.

MARTIN HARDSOCG, OF OTTUMWVA, IOWA.

COAL OR ROCK DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 484,425, dated October 18, 1892.

Application filed August 30, 1890. Serial No. 363,534. (No model.)

To all whom it may concern:

Be it known that I, MARTIN HARDSOCG, a citizen of the United States, residing at Ottumwa, in the county of Wapello and State of Iowa, have invented new and useful Improvements in Coal and Rock Drilling Machines, of which the following is a specification.

My invention relatesto coal and rock drilling machines, and involves means and arrangements for attaching removably the gearing and rotating mechanism to the clamping device which carries and directs the movements of the feed bar and drill, and also mechanism for supporting the drilling mechanism with vertical and horizontal adjustment. I attain these objects by the mechanism illusstrated in the accompanying drawings, in which Figure 1 represents a sectional view of the frame carrying the gearing and of the clamp for carrying the screw-threaded feed-bar, with its nut-head held in the housing or boxing of the frame. Fig. 2 represents an end View of the clamp and housing, the upper or dorsal part being thrown back and supported upon its hinge. Fig. 3 is a perspective view of the clamp and its housing or boxing attached to the frame and gearing by means of the nuthead of the frame heldin the housing or box ing. Fig. 4 is a view of a side elevation of the supporting-frame with means for vertical adjustment, and the feed-bar and drill supported therein. Fig. 5 is a view of a telescoping adjustable grip-bar carrying a bifurcated bracket to support the drill and rotating mechanism. Fig. Gis aperspective view of another form of grip-bar carrying a bifurcated bracket and the drill and rotating mechanism and means for adjusting the bracket thereon. Fig. 7 is a view of the bifurcated bracket hinged so as to spread, and of the socket in which it is held in normal position. Fig. 8 is a perspective view of the supportingframe and feed-bar and drill in the bracket. Fig. 9 is a perspective view of the frame and gearing attached to the clamp by means of the nut-head and housing.

Letter A represents the two beveled wheels or gearing, and D the crank-shaft to which the smaller beveled wheel is attached, supported in the bearing B, which is integral with the frame B B. The larger beveled wheel is provided with a hollow hub A, which is set in the bore or circular opening of the frame B B and acts as a journal for it, and it is held in place by the presence of the smaller beveled wheel. The interior bore of the larger beveled Wheel is provided with a feather or spline S, which engages in a longitudinal groove 25 in the feed-bar 5, causing the feed-bar to rotate with the wheel when the former is inserted. The bearing B is integrally connected with the frame B B by an arm, as shown. I

The frame B B is provided with an enlarged housing or boxing L to receive and hold the nut-head of the clamp G O, and the two are held in locked position by the setscrew K, as shown in Fig. 1, or by a pin or staple, as may be preferred; or the clamp may be provided at one or both ends with an enlarged housing or boxing to receive and hold the nut-head which may be constructed upon the frame, and thetwo may be held in place by a set-screw K, as shown in Fig. 10, or by a pin or staple; or the clamp may be provided with a clamping housing or boxing whose jaws open and close with the jaws of the clamping device to receive and hold the nut-head with which the frame is provided, as shown in Figs. 3 and 11. In the latter case the housing or boxing is provided with a chamber nicely fitted and adjusted to hold the nut-head, as shown.

The nut-head and the housing or boxing to receive it are constructed in the form of a square or with many sides or any other shape, so as to enable them to hold each other firmly, and also to enable proper adjustment, as may be required in operation.

The threaded screw-clamp C 0, provided with its housing or boxing or with a nut-head, is preferably constructed in two parts hinged together, so that it may easily open and close to enable the insertion or removal of the screw-threaded feed-bar 5. The jaws of the clamp are fastened by the projection of an open ear cl, which passes between two lugs f of the opposite jaw, and are held by a wedgeshaped key inserted in the opening of the ear d. The lower jaw of the clamp is also provided with arms 0 c to be afitixed in the frame of the supporting mechanism.

My invention relates to uniting detachably the clamp or feed-bar holder to the frame by means of a nut-head and aboxing or housing, which may be constructed convertibly upon the frame and the boxing or housing, or vice versa, respectively. In this latter construction the nut-head is inserted in the housing or boxing and the latter isprovided with openings k it, through which is inserted a double or yoked key K, passing immediately behind the projection of the nut-head and firmly holding them in place with reference to each other, the nut-head and the chamber of the boxing or housing being square or polygonal in shape. The key K is easily withdrawn and the frame removable from the clamp or feed-bar holder.

The feed-bar 5 and the drill are connected by any of the well-known means employed for that purpose, the feed-bar being provided with a male screw-thread of proper diameter to fit the screw-thread of the clamp and with a longitudinal groove t'to receive and engage with the spline.

The grip-bar F, Fig. 8, is adapted to be adjusted in a sliding collar 19 and fastened with a set-screw. It may be constructed of telescoping tubes or otherwise made capable of greater adjustment.

The bracket G is hinged at 13 and its two arms h h are curved, so that when in normal position their lower extremities will settle down into a socket and be firmly held by a set-screw 12. Their opposite extremities are provided with bearings into which the arms of the clamp c 0 may be easily introduced and held or removed by freeing the set-screw and spreading the arms of the bracket. The bracketis supported and adjustably held upon the grip-bar F.

The frame F. is constructed of two upright bars held firmly and parallel by permanent or movable collars M and N. It is provided with a sliding collar g, which may be elevated or lowered and fastened by the set-screw p. This sliding collar is provided near its center with an opening or bearing, into which is introduced an adjustable grip-bar F", which is fastened by the set-screw 11.

The cross-collars or cross-bars of the frame M and N are provided with openings or bearings. That at M is screw-threaded to admit the screw threaded pin 0 with ,a lever 6, that at N either circular or many sided to admit the pin or rod Z, which may be made of telescoping tubes set by set-screws 2 3, as shown in Fig. 4, or of one bar and tube or of one piece of bar or tube and held by a setscrew 3, as shown in Fig. 8.

From the foregoing description of the various parts it will be seen that one feature of my invention relates to the manner of attaching the frame that carries the rotating mechanism to the screw-threaded clamp, which is done by inserting the nut-head, which is constructed integrally with one, and the housing or boxing, which is constructed integrally with the other-a feature that is entirely new in drilling-machines. This feature of myinvention consists in attaching the gearingframe to the screw-threaded clamp by means of a nut-head integral with one and a housing or boxing to receive and hold it integral with the other.

I-leretofore in drilling-machines the gearing-frame and screw-threaded clamp have usually been made integral or secured together rigidly, or, if made in separate pieces, have not been secured together firmly with means of adj nstment, as shown in my invention. In many instances the screw-threaded clamp has been attached to a frame supporti ng the drilling mechanism, while the gearing.

was attached to the same by various devices. In other instances the frame which carries the gearing has been so constructed that the arms of the screw-threaded boxing rested in arms or projections of the frame which carries the gears; but in my invention themain body of the screw-threaded clamping device is attached within, upon, or around the extension of the main body of the frame that carries the gearinga feature which it is believed is not found in any other machine, and which permits the drill and feed-bar to be used with or without the gearing mechanism,

as shown in Fig. 8. While this may be done.

with a number of other machines, yet with those which have the gearing frame and screw-threaded clamp of one solid piece of material, the miner or operator is compelled to buy the complete machine with gear, while with the construction shown in myinvention he need not purchase the gearing unless desired, and the gearing can be subsequently purchased and attached, as required.

One great advantage of securing the gearing-frame to the screw-threaded clamp by means of the nut-head and housing or boxing is that the former may be fitted upon the latter at any desired angle with reference to the bracket or bearings that support the screw-threaded clamp. Ordinarily I prefer the nut-head and the housing or boxing that receives it to be square, which will admit of an adjustment at an angle of ninety degrees. By changing the square to a hexagon or octagon still slighter adjustments can be made. If a drill-hole is required down near the bottom of a mine, the frame maybe adjusted to the clamping device at such angle as will enable the crank of the gearing mechanism to be operated without contact with the floor or wall of the mine, Fig. 6. Heretofore these grips have been made of solid bars; but the objection to that construction is that they cannot always be set the proper depth into the coal, and after the drill has moved forward until the crank-handle comes in contact with the outer end of the grip-bar it is found the drill or anger cannot drill its full length. Where the angers or drills are not of proper length, it is desirable to move the bearings for the rotating mechanism forward or backward on the grip-bar. With asolid grip-bar this cannot be done; but with a telescoping grip-bar, Fig. 5, or an adjustable grip-bar F, Fig. 8, this can be done. The telescoping or adjustable grip-bars may be constructed of circular cylindrical tubes or of bars of any particular sectional form or shape.

Another feature of my invention relates to What is commonly known as the upright or post for supporting the drilling mechanism. While the drilling mechanism can be adjusted vertically in the notches of the post-frame, it cannot be horizontally adjusted with reference to the coal or material to be drilled, and my invention provides for both, and is illustrated in Fig 8. The obvious advantages of this arrangement are that while the drilling mechanism may be lowered or elevated, as desired, if the angers or drills are not of sufficient length the drilling mechanism can be adjusted to suit their length, and where it is desirable to drill a deeper hole than could be done with the ordinary post the horizontal grip-bar F" may be moved and fixed in the collar g, nearer the substance to be drilled, and the anger or drill can then be drilled deeper into it.

Another improvement upon coal and rock drilling machines relates to the bracket,which, resting upon the grip-bar, carries and supports the drilling mechanism. I-Ieretofore this bracket has been constructed of one solid piece of metal or of two arms or parts firmly bolted together. In my improvement the two bifurcated arms are pivotally attached on hinges at their lower extremities, so as to be easily spread or closed, thus enabling arms of the clamp that carries the drilling apparatus to be readily introduced or removed from the bracket.

Having thus described the several parts of my invention, I now describe the mode of operation. The support is placed in the desired position,having reference to the depth of the hole to be drilled, its height from the floor, and the length of anger employed. If the frame E E is employed, it is placed at the required distance from the wall. The screw-threaded pin 0, provided with a lever 6, is located upon a firm portion of the floor or a plate or slab and the'point of the adjustable rod or telescoping tubes 1 are set against the ceiling. The feed-bar 5 is inserted through the bore .of the frame of the gearing, the jaws of the clamp are closed around it, and the frame and the clamp attached by means of the nuthead and gearing. The arms 00 of the clamp are then set in the bifurcated bracket and the drill placed against the material to be drilled.

The operation of the crank upon the crankshaft D communicates rotary motion to the feed-bar and drill, which advance by means of the male screw-thread of the feed-bar working in the-female screw-thread of the clamp C O. The direction of the drill either vertically or laterallyis permitted by the bearings in the bracket and the arrangement of the support.

Having described my invention and its mode of operation, what I claim, and desire to secure'by Letters Patent, is-

1. In a drilling-machine, the combination of a screw-threaded hinged two-jawed clamp provided with arms upon opposite sides thereof, each of said jaws provided integrally at one or both ends with a corresponding jaw having a polygonally-shaped recess therein for a housing, means to hold the jaws of said clamp closed, with a frame provided with a flanged polygonally-shaped head adapted to fit the recessed chamber of said housing, a bevel-wheel with its hub journaled movably in the body of said frame and the interior bore of said hub provided with a spline, and a screw-threaded feed-bar provided with a longitudinal groove to engage said spline, and means to rotate said wheel, all substantially as shown.

2. In a drilling-machine, the combination of a screw-threaded hinged two-jawed clamp, each jaw provided integrally at one or both ends with a corresponding jaw having a poly,,- onally-shaped recess therein for a housing,

means for holding the jaws of said clamp closed, with a frame provided with a flanged polygonally-shaped nut or head adapted to be received and held in the recessed chamber of said housing, all substantially as shown.

3. In a drilling-machine, a screw-threaded hinged two-jawed clamp, each jaw provided integrally at one or both ends with a correspondin g jaw having a polygonally-shaped recess therein for a housing, adapted when closed to receive and hold in place a polygonally-shaped nut or head, and means for hold ing the jaws of said clamp closed, all substantially as shown.

4. In adrilling-machine,abifurcated hinged bracket provided with bearings to carry a drill and feed-bar and rotating mechanism, in combination with a collar provided with a slot to receive the hinged extremities of said bracket detachably and a set-screw to hold and fix the same in position, all substantially as shown.

MARTIN HARDSOOG. Witnesses:

WM. MONETT, J P. PURBAUGH. 

